MBE 4000 DDEC VI Troubleshooting – Section 33.1 SPN 168/FMI 0

Section 33.1
SPN 168/FMI 0

SPN 168/FMI 0 is a battery voltage high fault.‪

Section 33.1.1
Measure Battery Voltage

Measure the battery voltage as follows:‪

1. Measure battery voltage with the engine running at maximum rpm.
2. If greater than 16 volts, check for proper alternator operation and repair or replace, as required. Refer to "33.1.1.1 Verify Repairs" .

Section 33.1.1.1
Verify Repairs

Verify repairs as follows:‪

1. Turn ignition OFF.
2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
3. Clear codes with DDDL 7.0 or latest version.
4. Start and bring engine up to operating temperature (over 140°F/60°C).
5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel Customer Support Center at 313–592–5800.